Which of the following is a disadvantage of a butterfly valve?

A butterfly valve is well-known for its simple and efficient design, which allows for quick operation and ease of installation. However, a notable disadvantage of butterfly valves is that they can be prone to obstruction, particularly when dealing with viscous fluids or slurries that may cause debris or particulates to accumulate around the disc. This can interfere with the valve's movement, leading to operational issues or even complete failure of the valve to close or open properly.

The construction of a butterfly valve, which typically features a disc that rotates around a central axis to control flow, can make it susceptible to such obstructions. Proper maintenance and design considerations are needed to mitigate this risk, especially in applications where the fluid may contain solids or particulate matter.

Durability is usually not a disadvantage for butterfly valves, as they are constructed from materials that can withstand various pressures and temperatures. The simple design of a butterfly valve is considered an advantage for ease of use and maintenance rather than a disadvantage. Additionally, many butterfly valves possess automation potential with the ability to include actuator systems for remote operation. These factors distinctly highlight why being prone to obstruction is a relevant disadvantage specifically associated with butterfly valves.